About Hindi language:
Hindi or more precisely Modern Standard Hindi is a standardised and Sanskritised
register of the Hindustani language. Hindustani is the native language of most
people living in Delhi, Uttar Pradesh, Uttarakhand, Chhattisgarh, Himachal
Pradesh, Chandigarh, Bihar, Jharkhand, Madhya Pradesh, Haryana, and Rajasthan.
English and Hindi are the official languages of India. In the 2001
Indian census, 258 million people in India reported Hindi to be their native
language, which also include native speakers of related languages. (Reference:
Wikipedia)